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<Title>Bubble XY Scaling</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Bubble XY Scaling</p>
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<img src="images/bubblescale.png" width='450' height='420'>
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This example demonstrates a bubble chart with independent x and y bubble sizes and non-circular bubbles.<br><br>
In ChartDirector, a bubble chart in general is a scatter layer with the symbol sizes controlled by some other data series.<br><br>
ChartDirector supports using arbitrary symbols as bubbles. Thus bubble shape is not limited to circle but can be any shapes.<br><br>
Furthermore, ChartDirector supports independent x and y sizes for bubbles. This is useful for creating charts in which the bubbles reflect some features of the data points, such as its confidence zone, x and y errors, x and y standard deviations, etc.
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/bubblescale.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%
// The XY points for the bubble chart. The bubble chart has independent bubble size on the X and Y
// direction.
double[] dataX0 = {1000, 1500, 1700};
double[] dataY0 = {25, 20, 65};
double[] dataZX0 = {500, 200, 600};
double[] dataZY0 = {15, 30, 20};

double[] dataX1 = {500, 1000, 1300};
double[] dataY1 = {35, 50, 75};
double[] dataZX1 = {800, 300, 500};
double[] dataZY1 = {8, 27, 25};

double[] dataX2 = {150, 300};
double[] dataY2 = {20, 60};
double[] dataZX2 = {160, 400};
double[] dataZY2 = {30, 20};

// Create a XYChart object of size 450 x 420 pixels
XYChart c = new XYChart(450, 420);

// Set the plotarea at (55, 65) and of size 350 x 300 pixels, with a light grey border (0xc0c0c0).
// Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0)
c.setPlotArea(55, 65, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1);

// Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times Bold
// Italic font. Set the background and border color to Transparent.
c.addLegend(50, 30, false, "Times New Roman Bold Italic", 12).setBackground(Chart.Transparent);

// Add a title to the chart using 18pt Times Bold Itatic font.
c.addTitle("Plasma Battery Comparison", "Times New Roman Bold Italic", 18);

// Add titles to the axes using 12pt Arial Bold Italic font
c.yAxis().setTitle("Operating Current", "Arial Bold Italic", 12);
c.xAxis().setTitle("Operating Voltage", "Arial Bold Italic", 12);

// Set the axes line width to 3 pixels
c.xAxis().setWidth(3);
c.yAxis().setWidth(3);

// Add (dataX0, dataY0) as a standard scatter layer, and also as a "bubble" scatter layer, using
// circles as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX0, dataZY0)
// using the scale on the x and y axes.
c.addScatterLayer(dataX0, dataY0, "Vendor A", Chart.CircleSymbol, 9, 0xff3333, 0xff3333);
c.addScatterLayer(dataX0, dataY0, "", Chart.CircleSymbol, 9, 0x80ff3333, 0x80ff3333).setSymbolScale(
    dataZX0, Chart.XAxisScale, dataZY0, Chart.YAxisScale);

// Add (dataX1, dataY1) as a standard scatter layer, and also as a "bubble" scatter layer, using
// squares as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX1, dataZY1)
// using the scale on the x and y axes.
c.addScatterLayer(dataX1, dataY1, "Vendor B", Chart.SquareSymbol, 7, 0x3333ff, 0x3333ff);
c.addScatterLayer(dataX1, dataY1, "", Chart.SquareSymbol, 9, 0x803333ff, 0x803333ff).setSymbolScale(
    dataZX1, Chart.XAxisScale, dataZY1, Chart.YAxisScale);

// Add (dataX2, dataY2) as a standard scatter layer, and also as a "bubble" scatter layer, using
// diamonds as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX2, dataZY2)
// using the scale on the x and y axes.
c.addScatterLayer(dataX2, dataY2, "Vendor C", Chart.DiamondSymbol, 9, 0x00ff00, 0x00ff00);
c.addScatterLayer(dataX2, dataY2, "", Chart.DiamondSymbol, 9, 0x8033ff33, 0x8033ff33
    ).setSymbolScale(dataZX2, Chart.XAxisScale, dataZY2, Chart.YAxisScale);

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "",
    "title='Voltage = {x} +/- {={zx}/2} V, Current = {value} +/- {={zy}/2} A'"));
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Bubble XY Scaling&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Bubble XY Scaling
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here is the chart image ****** --&gt;
    &lt;%= viewer.renderHTML(response) %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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